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1. 发明专利

JPH10237574A PRECIPITATION STRENGTHENING SUPERALLOY 失效
公开(公告)号：JPH10237574A
公开(公告)日：1998-09-08
申请号：JP5554497
申请日：1997-02-24
申请人： JAPAN STEEL WORKS LTD
发明人： SHIBATA TAKASHI , TAKAHASHI TATSUYA , MIZUSAWA MAMORU , KUSUHASHI MIKIO
IPC分类号： C22C19/05 , C22C38/00 , C22C38/50 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To reduce segregation occurring in a steel ingot, to make it possible to product a large-size member so far considered to be impossible, and to secure mechanical properties equal to those of Inconel (R) 706 alloy by providing a composition consisting of Ni, Cr, Al, Ti, Nb, and the balance iron with inevitable impurities and preferably containing B and further Mo and/or W. SOLUTION: This alloy has a composition consisting of, by weight ratio, 35-45% Ni, 15-25% Cr,

2. 发明专利

JP2004256840A COMPOSITE REINFORCED TYPE Ni BASED SUPERALLOY, AND PRODUCTION METHOD THEREFOR 审中-公开
公开(公告)号：JP2004256840A
公开(公告)日：2004-09-16
申请号：JP2003046174
申请日：2003-02-24
申请人： JAPAN STEEL WORKS LTD
发明人： TAKAHASHI TATSUYA , SHIBATA TAKASHI , AZUMA TSUKASA
IPC分类号： C22F1/10 , C22C19/05 , C22F1/00
摘要： PROBLEM TO BE SOLVED: To obtain an Ni based superalloy which has excellent strength, ductility and toughness in a range from a room temperature to a high temperature, and is used for the stock to be exposed to a high temperature such as a turbine rotor and a turbine disk. SOLUTION: The composite reinforced type Ni based superalloy comprises 13 to 21% Cr, 5 to 15% Co, 1.0 to 5.0% Mo, 1.0 to 5.0% Al, 0.005 to 0.1% C, ≤0.015% B and one or two kinds of metals selected from ≤3.0% Re and 0.1 to 5.0% W, and, if required, comprises COPYRIGHT: (C)2004,JPO&NCIPI

3. 发明专利

JP2000273597A MANUFACTURE OF PRECIPITATION STRENGTHENING TYPE Ni-Fe- BASE SUPERALLOY 失效
公开(公告)号：JP2000273597A
公开(公告)日：2000-10-03
申请号：JP7594299
申请日：1999-03-19
申请人： JAPAN STEEL WORKS LTD
发明人： SHIBATA TAKASHI , TAKAHASHI TATSUYA
IPC分类号： C22F1/00 , C22F1/10
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method capable of efficiently manufacturing a precipitation strengthening type Ni-Fe-base superalloy satisfying required tensile characteristics. SOLUTION: %Ti (Ti content, wt.%), %Nb (Nb content, wt.%), R (average cooling rate from solution heat treatment temperature to 600 deg.C, deg.C/min), T1 (first-stage aging treatment temperature, deg.C), and t1 (first-stage aging treatment time, hr) are set up so that, according to the required tensile characteristics at room temperature, respective values of A, B, C, and D which are computed by the undermentioned equaions satisfy A >= tensile stress, B >=0.2% yield stress, C >= rupture ductility, and D >= rupture drawing: A=230(%Ti)+110(% Nb)-0.50(R)+3.2(T1)+7.2(t1)-1800; B=240(%Ti)+190(%Nb)-0.10(R)+4.4(T 1)+9.4(t1)-3200; C=-18(%Ti)-11(%Nb)+0.04(R)-0.4(T1)-0.8(t1)+370; and D=-24(%Ti)-8(%Nb)+0.08(R)-0.6(T1)-0.9(t1)+500. Because manufacturing conditions can be set up by using the equations and inequalities, the precipitation strengthening type Ni-Fe-base superalloy satisfying required tensile characteristics can be obtained efficiently without vast preliminary experiments.

4. 发明专利

JPH10237609A PRODUCTION OF PRECIPITATION STRENGTHENING NICKEL-IRON-BASE SUPERALLOY 失效
公开(公告)号：JPH10237609A
公开(公告)日：1998-09-08
申请号：JP5554397
申请日：1997-02-24
申请人： JAPAN STEEL WORKS LTD
发明人： SHIBATA TAKASHI , TAKAHASHI TATSUYA , KUSUHASHI MIKIO
IPC分类号： C22F1/00 , C22F1/10
摘要： PROBLEM TO BE SOLVED: To simultaneously provide satisfactory ductility, strength, and creep characteristic by setting average cooling velocity at cooling after solution heat treatment at a value in a specific range at the time of producing a superalloy containing Ni and Fe as matrix. SOLUTION: A precipitation hardening superalloy, having a composition consisting of, by weight ratio, about 0.005% C, about 0.02% Si, about 0.02% Mn, about 0.003% P, about 0.0005% S, 42.00% Ni, about 16.08% Cr, about 2.85% Nb, about 1.75% Ti, about 0.30% Al, about 0.0048% B, and the balance Fe, is prepared. This superalloy is subjected to solution heat treatment at about 980 deg.C for about 3hr and then cooled down to 600 deg.C at (5 to 50) deg.C/min cooling rate, and air cooling is done from 600 deg.C to room temp. The alloy is aged at about 720 deg.C for about 8hr and successively at about 620 deg.C for about 8hr to undergo two stage heat treatment. Strength can be improved by the increase in the amount of precipitated phase owing to setting of the above range of cooling rate, and consequently, rate of creep can be improved.

5. 发明专利

JPH06330161A MANUFACTURE OF PRECIPITATION HARDENING TYPE FE-NI GROUP HEAT RESISTING ALLOY 失效
公开(公告)号：JPH06330161A
公开(公告)日：1994-11-29
申请号：JP14546393
申请日：1993-05-26
申请人： JAPAN STEEL WORKS LTD
发明人： TAKAHASHI TATSUYA
IPC分类号： C21D6/00 , C21D8/00
摘要： PURPOSE:To further improve a high temp. property by micronizing the crystalline grain size of a precipitation hardening type Fe-Ni group heat resisting alloy. CONSTITUTION:After a precipitation hardening type Fe-Ni group heat resisting alloy is hot-forged; in the middle of descending temp., a solution treatment is performed at 920-1020 deg.C; and in the middle of subsequently descending temp., a stabilizing treatment is performed at 80-860 deg.C. Consequently, keeping out of the formation of a secondary precipitation phase, the crylstalline grain size can be micronized, and also a high temp. property is improved through a grain boundary strengthening.

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